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If the GETATTR request on a file that has write delegation in effect and the request attributes include the change info and size attribute then the write delegation is recalled. If the delegation is returned within 30ms then the GETATTR is serviced as normal otherwise the NFS4ERR_DELAY error is returned for the GETATTR. Add counter for write delegation recall due to conflict GETATTR. This is used to evaluate the need to implement CB_GETATTR to adoid recalling the delegation with conflit GETATTR. Signed-off-by: Dai Ngo <dai.ngo@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* procfs-based user access to knfsd statistics
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*
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* /proc/net/rpc/nfsd
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*
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* Format:
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* rc <hits> <misses> <nocache>
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* Statistsics for the reply cache
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* fh <stale> <deprecated filehandle cache stats>
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* statistics for filehandle lookup
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* io <bytes-read> <bytes-written>
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* statistics for IO throughput
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* th <threads> <deprecated thread usage histogram stats>
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* number of threads
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* ra <deprecated ra-cache stats>
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*
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* plus generic RPC stats (see net/sunrpc/stats.c)
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*
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* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/seq_file.h>
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#include <linux/module.h>
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#include <linux/sunrpc/stats.h>
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#include <net/net_namespace.h>
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#include "nfsd.h"
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struct nfsd_stats nfsdstats;
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struct svc_stat nfsd_svcstats = {
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.program = &nfsd_program,
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};
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static int nfsd_show(struct seq_file *seq, void *v)
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{
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int i;
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seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]),
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]),
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]),
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_FH_STALE]),
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_READ]),
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_WRITE]));
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/* thread usage: */
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seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
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/* deprecated thread usage histogram stats */
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for (i = 0; i < 10; i++)
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seq_puts(seq, " 0.000");
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/* deprecated ra-cache stats */
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seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
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/* show my rpc info */
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svc_seq_show(seq, &nfsd_svcstats);
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#ifdef CONFIG_NFSD_V4
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/* Show count for individual nfsv4 operations */
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/* Writing operation numbers 0 1 2 also for maintaining uniformity */
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seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
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for (i = 0; i <= LAST_NFS4_OP; i++) {
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seq_printf(seq, " %lld",
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_NFS4_OP(i)]));
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}
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seq_printf(seq, "\nwdeleg_getattr %lld",
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percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]));
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seq_putc(seq, '\n');
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#endif
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return 0;
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}
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DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
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int nfsd_percpu_counters_init(struct percpu_counter counters[], int num)
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{
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int i, err = 0;
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for (i = 0; !err && i < num; i++)
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err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
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if (!err)
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return 0;
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for (; i > 0; i--)
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percpu_counter_destroy(&counters[i-1]);
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return err;
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}
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void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
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{
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int i;
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for (i = 0; i < num; i++)
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percpu_counter_set(&counters[i], 0);
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}
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void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
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{
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int i;
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for (i = 0; i < num; i++)
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percpu_counter_destroy(&counters[i]);
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}
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static int nfsd_stat_counters_init(void)
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{
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return nfsd_percpu_counters_init(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
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}
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static void nfsd_stat_counters_destroy(void)
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{
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nfsd_percpu_counters_destroy(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
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}
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int nfsd_stat_init(void)
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{
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int err;
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err = nfsd_stat_counters_init();
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if (err)
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return err;
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svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);
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return 0;
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}
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void nfsd_stat_shutdown(void)
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{
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nfsd_stat_counters_destroy();
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svc_proc_unregister(&init_net, "nfsd");
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}
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